Gearing



w@ sToEcmcH.

GEARING.

APPLICATION FILED JULY 14| 1921.

Patented May 23, w22,

Application filed Julylit,

which l-have nled application in Germany lil/lay 20, 1920,) which the following is a specification.

` This invention relates to a :triction gearing` in which the trictional circunigterential s urlace of least one oit the gear wheels is curved inthe axialdirection oi' the wheel, in such a rnanner that the tangent intersects the rotary aires of the two wheels at the point ci" contact oi the frictional sui'- acesj The invention proper consists in the `one wheel being positively displaced along its axle and during such `displacement transmitting to the other wheel a. power which "roportional to the turning moment of the driving` shaft, the power transmission being,1 thus atunction ot the turning?r nioinent.

ln'order to malte my invention incre clear, reier to the accompanyingdrawing, in which ll1 igure l is an axial section through one .toirn of construction otl the improved gearing` shown 'askin example, and Figure Q is a similar section solely through the snialler ot the two wheels, the section lyingl at right angles to that of Figure l.

o and Z) are `the two friction wheels, ot

i l r i l y which the wheel a is atlixed `to the driving)l .Vi O

shai't o, while the wheel is aflliized to the driven shaft fw. The shaft o is lirinly connected with a cylindrical member o having; a semicircular groove c. ylhe wheel is supported by said member c and provided with a roll ol engaging 4the groove c. The roll is held in place Vby a pivot projecting- 'forth troni the inner surjtace of' the hul) ot the wheel. Instead-of the roll an appropriately thick pinion may be made use oi.

'llhe wheel o sits loosely upon the ineinber c and is connected with it solely by the roll d, in that this latter engages the' groove e, as already described. @wing to this kind oit connection, the wheel a, is capable oi a rotary motion upon the nieniber c, as well as of an axial motion, the resultant motion being1 practically directed towards the wheel o. Y

This latter wheel is either irinly attached to the shaft fw or capable ot a certain axial displacement, as is the case in the torni of construction shown in the drawing. rllhe tends to inove the roll nl, andv irai. serial no. istria.

wheel l is here under the pressure ot a sprin@v yt' which tends to t isplace the wheel E) in a direction opposite to the direction ot action ci' the groove e with respect to the roll (Z and the wheel u. rllhe outer end ot the spring j lies agai st a collar 7i, lifted to the shaft w. l wish it to be understood that the spring' is not indispensaoly requisite laeoause the wheel o may be nrnily secur l to the shaft to, as already mentioned, aad, rurtherniore, it is not absolutely necessary that the wheels o and o cooperate directly 'with one another; the rot 'on inay be transmitted, it desired or preferred, hy one or incre intermediate wheels, the case may vbei` vit is a matter ot course that the device clairned may also be applied to i'rictional gears. l

lllhe manner of operation is as follows: During standstill or runningl without load the position" ot the wheel o relative to the cylindrical rneniher c is such that the roll (t is in `tlievertex of the groove as in l and 2.` lt' now the shafts is tu 'i `the one or the other direction, the alcove e l thus, the wheel a., too, in the direction ot the arrow. llhe A i w y i i intensity oi: tht-shearing `torce depends upon the pitch ot the 1Q'rornfe and is pioi i\f i =tioiial to the erioheral sewer or to 'the tur-nine; i i i Y a moment to be transmitted resinictively,

The wheel o is displaced upon the ineinber c until the counter-pres ure ot 'the wheel l), or oit' thespring` respectively, balances the ax al shearino' Jower oit the wheel. rll`he a i, iiower with which the two wheels are pressed one against the other is always proportional to the turning; inoment to be transmitted. The point-contact oil' the curved oircinn'torential surface 'ot the wheel Y) with the conical circunrferential tace ot the wheel n', enables an exact inination oit the rear ratio The inclination ot the curved il (l vsuoli as e, the second being then provided Having new described my invention; what l desire to secure by a patent of the United States is:

i. Friction gearing; consisting of a driving shaftl provided with a relatively-short peripheral groove; a driving wheel mounted immediately on the grooved portion of said shaft and having a single projection for coaction with said groove which is normally disposed at the center of the groove and is adapted to travel toward either end thereof 'when the rotation of the shaft commences; according to the direction of such rotation, and to maintain its end position throughout the continuation of the rotation; a driven shaft; and a wheel coupled to the driven shaft to rotate therewith and adapted to be driven from the driving wheel, the direction of said groove with relation to the axis of the driving shaft being such as to cause the driving wheel to move' along said driving shaft toward the driven wheel so as to transmit to the latter a power which is proportional to the torque of the driving shaft.

2. VFriction gearing, comprising, in combination; a driving shaft; a cylindrical member affixed to said shaft and provided with a semicircular groove having its vortex inthe neighbourhood of one end face of said member and its legs directed towards the opposite end face thereof; a driving wheel loosely encompassing the Asaid member; a projection attached to the inner surface of the hub of the driving wheel and adapted to transmit the power from the cylindrical member to the driving wheel and both to rotate and to shift said driving wheel axially; a driven shaft;.and a driven wheel coupled to said driven shaft so as to rotate therewith and being in circumferential contact with the said driving wheel; at least one of said wheels having a rim which is curved in the direction of the shaft of that whee Friction gearing, comprising, in combination; a driving shaft provided with a f groove extending at an angle with respec' te the axis of the shaft; a driving wheel encompassing loosely the shaft portion having liid groove; a projection ailixod to said wheel and extending into said groove; a driven shaft; a driven wheel coupled to said driven shaft and adapted to be axially displaced along it; and a spring so arranged as to counteract the displacement of the driven wheel; said driven wheel being in circumferential contact with said driving wheel, and one of said wheels having a rim which is curved in the direction of the shaft of that wheel, for the purpose set forth.

li. Friction gearing; comprising; in conibination; a driving shaft; a cylindrical member afiixed to said shaft and provided with a semicircular groove having its vortex in the neighborhood of one end face of said member and its legs directed towards the oppositie end face thereof; a driving wheel loosely encompassing the said meniber; a projection attached to the inner surface of the huh of the driving wheel and adapted to transmit the power from the cylindrical member to the driving wheel and both to rotate and to shift said driving wheel axially; a driven shaft; a driven wheel coupled to said driven shaft and adapted to be axially displaced along it; and a spring so arranged as to counteract the displacement of the driven wheel; said driven wheel being in circumferential contact with said driving wheel and having a rim which is curved in the direction of the siaft of the driven wheel; substantially as described and shown.

5. Friction gearing, as claimed in claim l, in which the groove in the driving shaft is of sen'iicircular forni.

fn testimony whereof have aflixed signature in presence of two witnesses.

1WILHCLM STOECKICHT. lVitnesses P, PAUL Dnnr, RICHARD LUTZ. 

